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<div id="overview"><a href="../../../../../../apidocs/org/mybatis/generator/internal/util/HashCodeUtil.html">View Javadoc</a></div><pre>
<a class="jxr_linenumber" name="L1" href="#L1">1</a>   <strong class="jxr_keyword">package</strong> org.mybatis.generator.internal.util;
<a class="jxr_linenumber" name="L2" href="#L2">2</a>   
<a class="jxr_linenumber" name="L3" href="#L3">3</a>   <strong class="jxr_keyword">import</strong> java.lang.reflect.Array;
<a class="jxr_linenumber" name="L4" href="#L4">4</a>   
<a class="jxr_linenumber" name="L5" href="#L5">5</a>   <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a>   <em class="jxr_javadoccomment"> * This class is from javapractices.com:</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a>   <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a>   <em class="jxr_javadoccomment"> * <a href="http://www.javapractices.com/Topic28.cj" target="alexandria_uri">http://www.javapractices.com/Topic28.cj</a>p</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a>   <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a>  <em class="jxr_javadoccomment"> * Collected methods which allow easy implementation of &lt;code&gt;hashCode&lt;/code&gt;.</em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a>  <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a>  <em class="jxr_javadoccomment"> * Example use case:</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a>  <em class="jxr_javadoccomment"> * </em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a>  <em class="jxr_javadoccomment"> * &lt;pre&gt;</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a>  <em class="jxr_javadoccomment"> * public int hashCode() {</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a>  <em class="jxr_javadoccomment"> *     int result = HashCodeUtil.SEED;</em>
<a class="jxr_linenumber" name="L17" href="#L17">17</a>  <em class="jxr_javadoccomment"> *     //collect the contributions of various fields</em>
<a class="jxr_linenumber" name="L18" href="#L18">18</a>  <em class="jxr_javadoccomment"> *     result = HashCodeUtil.hash(result, fPrimitive);</em>
<a class="jxr_linenumber" name="L19" href="#L19">19</a>  <em class="jxr_javadoccomment"> *     result = HashCodeUtil.hash(result, fObject);</em>
<a class="jxr_linenumber" name="L20" href="#L20">20</a>  <em class="jxr_javadoccomment"> *     result = HashCodeUtil.hash(result, fArray);</em>
<a class="jxr_linenumber" name="L21" href="#L21">21</a>  <em class="jxr_javadoccomment"> *     return result;</em>
<a class="jxr_linenumber" name="L22" href="#L22">22</a>  <em class="jxr_javadoccomment"> * }</em>
<a class="jxr_linenumber" name="L23" href="#L23">23</a>  <em class="jxr_javadoccomment"> * &lt;/pre&gt;</em>
<a class="jxr_linenumber" name="L24" href="#L24">24</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L25" href="#L25">25</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/mybatis/generator/internal/util/HashCodeUtil.html">HashCodeUtil</a> {
<a class="jxr_linenumber" name="L26" href="#L26">26</a>  
<a class="jxr_linenumber" name="L27" href="#L27">27</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L28" href="#L28">28</a>  <em class="jxr_javadoccomment">     * An initial value for a &lt;code&gt;hashCode&lt;/code&gt;, to which is added</em>
<a class="jxr_linenumber" name="L29" href="#L29">29</a>  <em class="jxr_javadoccomment">     * contributions from fields. Using a non-zero value decreases collisons of</em>
<a class="jxr_linenumber" name="L30" href="#L30">30</a>  <em class="jxr_javadoccomment">     * &lt;code&gt;hashCode&lt;/code&gt; values.</em>
<a class="jxr_linenumber" name="L31" href="#L31">31</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L32" href="#L32">32</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> SEED = 23;
<a class="jxr_linenumber" name="L33" href="#L33">33</a>  
<a class="jxr_linenumber" name="L34" href="#L34">34</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L35" href="#L35">35</a>  <em class="jxr_javadoccomment">     * booleans.</em>
<a class="jxr_linenumber" name="L36" href="#L36">36</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L37" href="#L37">37</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">boolean</strong> aBoolean) {
<a class="jxr_linenumber" name="L38" href="#L38">38</a>          <strong class="jxr_keyword">return</strong> firstTerm(aSeed) + (aBoolean ? 1 : 0);
<a class="jxr_linenumber" name="L39" href="#L39">39</a>      }
<a class="jxr_linenumber" name="L40" href="#L40">40</a>  
<a class="jxr_linenumber" name="L41" href="#L41">41</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L42" href="#L42">42</a>  <em class="jxr_javadoccomment">     * chars.</em>
<a class="jxr_linenumber" name="L43" href="#L43">43</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L44" href="#L44">44</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">char</strong> aChar) {
<a class="jxr_linenumber" name="L45" href="#L45">45</a>          <strong class="jxr_keyword">return</strong> firstTerm(aSeed) + aChar;
<a class="jxr_linenumber" name="L46" href="#L46">46</a>      }
<a class="jxr_linenumber" name="L47" href="#L47">47</a>  
<a class="jxr_linenumber" name="L48" href="#L48">48</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L49" href="#L49">49</a>  <em class="jxr_javadoccomment">     * ints.</em>
<a class="jxr_linenumber" name="L50" href="#L50">50</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L51" href="#L51">51</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">int</strong> aInt) {
<a class="jxr_linenumber" name="L52" href="#L52">52</a>          <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L53" href="#L53">53</a>  <em class="jxr_comment">         * Implementation Note Note that byte and short are handled by this</em>
<a class="jxr_linenumber" name="L54" href="#L54">54</a>  <em class="jxr_comment">         * method, through implicit conversion.</em>
<a class="jxr_linenumber" name="L55" href="#L55">55</a>  <em class="jxr_comment">         */</em>
<a class="jxr_linenumber" name="L56" href="#L56">56</a>          <strong class="jxr_keyword">return</strong> firstTerm(aSeed) + aInt;
<a class="jxr_linenumber" name="L57" href="#L57">57</a>      }
<a class="jxr_linenumber" name="L58" href="#L58">58</a>  
<a class="jxr_linenumber" name="L59" href="#L59">59</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L60" href="#L60">60</a>  <em class="jxr_javadoccomment">     * longs.</em>
<a class="jxr_linenumber" name="L61" href="#L61">61</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L62" href="#L62">62</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">long</strong> aLong) {
<a class="jxr_linenumber" name="L63" href="#L63">63</a>          <strong class="jxr_keyword">return</strong> firstTerm(aSeed) + (<strong class="jxr_keyword">int</strong>) (aLong ^ (aLong &gt;&gt;&gt; 32));
<a class="jxr_linenumber" name="L64" href="#L64">64</a>      }
<a class="jxr_linenumber" name="L65" href="#L65">65</a>  
<a class="jxr_linenumber" name="L66" href="#L66">66</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L67" href="#L67">67</a>  <em class="jxr_javadoccomment">     * floats.</em>
<a class="jxr_linenumber" name="L68" href="#L68">68</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L69" href="#L69">69</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">float</strong> aFloat) {
<a class="jxr_linenumber" name="L70" href="#L70">70</a>          <strong class="jxr_keyword">return</strong> hash(aSeed, Float.floatToIntBits(aFloat));
<a class="jxr_linenumber" name="L71" href="#L71">71</a>      }
<a class="jxr_linenumber" name="L72" href="#L72">72</a>  
<a class="jxr_linenumber" name="L73" href="#L73">73</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a>  <em class="jxr_javadoccomment">     * doubles.</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, <strong class="jxr_keyword">double</strong> aDouble) {
<a class="jxr_linenumber" name="L77" href="#L77">77</a>          <strong class="jxr_keyword">return</strong> hash(aSeed, Double.doubleToLongBits(aDouble));
<a class="jxr_linenumber" name="L78" href="#L78">78</a>      }
<a class="jxr_linenumber" name="L79" href="#L79">79</a>  
<a class="jxr_linenumber" name="L80" href="#L80">80</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L81" href="#L81">81</a>  <em class="jxr_javadoccomment">     * &lt;code&gt;aObject&lt;/code&gt; is a possibly-null object field, and possibly an</em>
<a class="jxr_linenumber" name="L82" href="#L82">82</a>  <em class="jxr_javadoccomment">     * array.</em>
<a class="jxr_linenumber" name="L83" href="#L83">83</a>  <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="L84" href="#L84">84</a>  <em class="jxr_javadoccomment">     * If &lt;code&gt;aObject&lt;/code&gt; is an array, then each element may be a primitive</em>
<a class="jxr_linenumber" name="L85" href="#L85">85</a>  <em class="jxr_javadoccomment">     * or a possibly-null object.</em>
<a class="jxr_linenumber" name="L86" href="#L86">86</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="L87" href="#L87">87</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> hash(<strong class="jxr_keyword">int</strong> aSeed, Object aObject) {
<a class="jxr_linenumber" name="L88" href="#L88">88</a>          <strong class="jxr_keyword">int</strong> result = aSeed;
<a class="jxr_linenumber" name="L89" href="#L89">89</a>          <strong class="jxr_keyword">if</strong> (aObject == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L90" href="#L90">90</a>              result = hash(result, 0);
<a class="jxr_linenumber" name="L91" href="#L91">91</a>          } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (!isArray(aObject)) {
<a class="jxr_linenumber" name="L92" href="#L92">92</a>              result = hash(result, aObject.hashCode());
<a class="jxr_linenumber" name="L93" href="#L93">93</a>          } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="L94" href="#L94">94</a>              <strong class="jxr_keyword">int</strong> length = Array.getLength(aObject);
<a class="jxr_linenumber" name="L95" href="#L95">95</a>              <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> idx = 0; idx &lt; length; ++idx) {
<a class="jxr_linenumber" name="L96" href="#L96">96</a>                  Object item = Array.get(aObject, idx);
<a class="jxr_linenumber" name="L97" href="#L97">97</a>                  <em class="jxr_comment">// recursive call!</em>
<a class="jxr_linenumber" name="L98" href="#L98">98</a>                  result = hash(result, item);
<a class="jxr_linenumber" name="L99" href="#L99">99</a>              }
<a class="jxr_linenumber" name="L100" href="#L100">100</a>         }
<a class="jxr_linenumber" name="L101" href="#L101">101</a>         <strong class="jxr_keyword">return</strong> result;
<a class="jxr_linenumber" name="L102" href="#L102">102</a>     }
<a class="jxr_linenumber" name="L103" href="#L103">103</a> 
<a class="jxr_linenumber" name="L104" href="#L104">104</a>     <em class="jxr_comment">// / PRIVATE ///</em>
<a class="jxr_linenumber" name="L105" href="#L105">105</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> fODD_PRIME_NUMBER = 37;
<a class="jxr_linenumber" name="L106" href="#L106">106</a> 
<a class="jxr_linenumber" name="L107" href="#L107">107</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> firstTerm(<strong class="jxr_keyword">int</strong> aSeed) {
<a class="jxr_linenumber" name="L108" href="#L108">108</a>         <strong class="jxr_keyword">return</strong> fODD_PRIME_NUMBER * aSeed;
<a class="jxr_linenumber" name="L109" href="#L109">109</a>     }
<a class="jxr_linenumber" name="L110" href="#L110">110</a> 
<a class="jxr_linenumber" name="L111" href="#L111">111</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">boolean</strong> isArray(Object aObject) {
<a class="jxr_linenumber" name="L112" href="#L112">112</a>         <strong class="jxr_keyword">return</strong> aObject.getClass().isArray();
<a class="jxr_linenumber" name="L113" href="#L113">113</a>     }
<a class="jxr_linenumber" name="L114" href="#L114">114</a> }
</pre>
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